Fixing support of ventilating duct

The utility model provides a fixing support of a ventilation pipeline, and relates to the technical field of air pipe supports, the fixing support of the ventilation pipeline comprises a supporting assembly and a connecting assembly, and steel beams, C-shaped steel, pressing plates, buckles, harness cord hanging rods, fixing bolts, supporting plates, the ventilation pipeline and fixing pieces are arranged; the problems that when a harness cord suspender is installed at a high altitude, holing needs to be carried out to serve as an installation point, holing is difficult to apply to some large high-altitude area steel frame beams, holing is troublesome, holing needs to be carried out again once holing positions are not accurate or the positions need to be adjusted in the pipeline laying process, and holing is not convenient can be solved. In order to solve the problems that the working efficiency is undoubtedly reduced and the adaptability is poor in the prior art, C-shaped steel is fixed to a steel beam throu